<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<script src="https://cdn.bootcdn.net/ajax/libs/vue/2.6.9/vue.js"></script>
<style>
    [v-cloak] {
        display: none;
    }
</style>
<body>
    <div id="box">
        <h1 v-cloak>{{msg}}</h1>
    </div>
    <script>
        const v_c = new Vue({
            el: '#box',
            data: {
                msg: 'vue开发中当屏幕出现{{xxx}}},电脑速度快的才有'
            }
        })
    </script>
</body>

</html>